Electromagnetic wave absorbing properties and hyperfine interactions of Fe–Cu–Nb–Si–B nanocomposites

作     者：韩满贵 郭韦 吴燕辉 刘明 Magundappa L. Hadimanic Han Man-Gui;Guo Wei;Wu Yan-Hui;Liu Min;Magundappa L. Hadimanic;State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China;Analytical and Testing Center, Sichuan University;Department of Electrical and Computer Engineering, Iowa State University

作者机构：State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China Analytical and Testing Center Sichuan University Department of Electrical and Computer Engineering Iowa State University 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2014年第23卷第8期

页      面：50-54页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：Project supported by the Research Fund for International Young Scientists of the National Natural Science Foundation of China(Grant No.61250110544) the National Natural Science Foundation of China(Grant No.61271039) the Scientific Foundation of Young Scientists in Sichuan Province,China(Grant No.2012JQ0053) the Program for New Century Excellent Talents in Universities,China(Grant No.NCET-11-0060) 

主　　题：Mossbauer spectroscopy magnetic permeability nanocrystalline alloys 

摘      要：The Fe-Cu-Nb-Si-B alloy nanocomposite containing two ferromagnetic phases （amorphous phase and nanophase phase） is obtained by properly annealing the as-prepared alloys. High resolution transmission electron microscopy （HR- TEM） images show the coexistence of these two phases. It is found that Fe-Si nanograins are surrounded by the retained amorphous ferromagnetic phase. Mossbauer spectroscopy measurements show that the nanophase is the D03-type Fe- Si phase, which is employed to find the atomic fractions of resonant 57Fe atoms in these two phases. The microwave permittivity and permeability spectra of Fe-Cu-Nb-Si-B nanocomposite are measured in the frequency range of 0.5 GHz- 10 GHz. Large relative microwave permeability values are obtained. The results show that the absorber containing the nanocomposite flakes with a volume fraction of 28.59% exhibits good microwave absorption properties. The reflection loss of the absorber is less than -10 dB in a frequency band of 1.93 GHz-3.20 GHz.